CVE-2026-23001
High
Description
In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/[email protected]/T/#u
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedJan 25, 2026
First seenJan 25, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.18.1 ≤ v < 5.10.249, 5.11 ≤ v < 5.15.199, 5.16 ≤ v < 6.1.162, 6.2 ≤ v < 6.6.122, 6.7 ≤ v < 6.12.67, 6.13 ≤ v < 6.18.7, 3.18, 6.19 | 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 |
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